.login_box {
    width: 100%;
    height: 100%;
    background: url("http://img.pconline.com.cn/images/upload/upc/tx/wallpaper/1206/04/c1/11869944_1338790262393.jpg") no-repeat;
  }
  .input_box{
    width: 400px;
    padding: 40px 20px;
    border: 1px solid #ccc;
    border-radius: 8px;
    background: #fff;
    position: absolute;
    right: 15%;
    top: 25%;
    box-sizing: border-box
  }
  .Aform{
    font-size: 14px;
      font-variant: tabular-nums;
      line-height: 1.5;
      color: rgba(0, 0, 0, 0.65);
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      list-style: none;
  }
  .ant {
    width: 300px;
    /* margin-left: 40px; */
  }
  .btn{
    width: 290px;
    position: relative;
    left: 5px;
  }
  